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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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About the <head>

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CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.

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Babel is required to process package imports. If you need a different preprocessor remove all packages first.

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About External Resources

You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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HTML 

              
                html(lang="es")
  head
    meta(charset="UTF-8")
    title Vertical timeline intervals
  body
    .container
      ul
        li
          span
          div
            .title Codify
            .info Let&apos;s make coolest things in css
            .type Presentation
          |  
          span.number
            span 10:00
            |  
            span 12:00
        li
          div
            span
            .title Codify
            .info Let&apos;s make coolest things in javascript
            .type Presentation
          |  
          span.number
            span 13:00
            |  
            span 14:00
        li
          div
            span
            .title Codify
            .info Let&apos;s make coolest things in css
            .type Review
          |  
          span.number
            span 15:00
            |  
            span 17:45
!

CSS 

              
                @import url('https://fonts.googleapis.com/css?family=Open+Sans:300,400,600,700')

body
  height: 100vh
  font-family: 'Open Sans', sans-serif
  /* Permalink - use to edit and share this gradient: http://colorzilla.com/gradient-editor/#bea2e7+0,86b7e7+100
  background: #bea2e7
  /* Old browsers
  background: -moz-linear-gradient(top, #bea2e7 0%, #86b7e7 100%)
  /* FF3.6-15
  background: -webkit-linear-gradient(top, #bea2e7 0%, #86b7e7 100%)
  /* Chrome10-25,Safari5.1-6
  background: linear-gradient(to bottom, #bea2e7 0%, #86b7e7 100%)
  /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#bea2e7', endColorstr='#86b7e7',GradientType=0 )
  /* IE6-9

.container
  ul
    margin: 0
    margin-top: 100px
    list-style: none
    position: relative
    padding: 1px 100px
    color: #fff
    font-size: 13px
    &:before
      content: ''
      width: 1px
      height: 100%
      position: absolute
      border-left: 2px dashed #fff
    li
      position: relative
      margin-left: 30px
      background-color: rgba(255, 255, 255, 0.2)
      padding: 14px
      border-radius: 6px
      width: 250px
      box-shadow: 0 0 4px rgba(0, 0, 0, 0.12), 0 2px 2px rgba(0, 0, 0, 0.08)
      &:not(:first-child)
        margin-top: 60px
      > span
        width: 2px
        height: 100%
        background: #fff
        left: -30px
        top: 0
        position: absolute
        &:before, &:after
          content: ''
          width: 8px
          height: 8px
          border-radius: 50%
          border: 2px solid #fff
          position: absolute
          background: #86b7e7
          left: -5px
          top: 0
      span:after
        top: 100%
      > div
        margin-left: 10px
  div
    .title, .type
      font-weight: 600
      font-size: 12px
    .info
      font-weight: 300
    > div
      margin-top: 5px
  span.number
    height: 100%
    span
      position: absolute
      font-size: 10px
      left: -35px
      font-weight: bold
      &:first-child
        top: 0
      &:last-child
        top: 100%
!

JS
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999px

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